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It is built up with a dual-channel based signal generator on DDWS and a quadrature modulator. 该产生器由DDWS技术双路基带信号产生器和正交调制器组成。
Confirm the scheme of mixed charge pump Phase-locked loops. 4, Analyze the theory of quadrature modulator, methods of restraining local oscillator leakage and side-band leakage. 确定了使用混合式电荷泵锁相环方案，并完成锁相环电路的设计和调试。